Change un/pwd handling to match Buildah's

Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com>

cmd/podman/pull.go

@@ -1,16 +1,14 @@
 package main
 
 import (
-	"fmt"
 	"io"
 	"os"
 
-	"golang.org/x/crypto/ssh/terminal"
-
 	"github.com/containers/image/types"
 	"github.com/pkg/errors"
 	"github.com/projectatomic/libpod/libpod"
 	"github.com/projectatomic/libpod/libpod/common"
+	"github.com/projectatomic/libpod/pkg/util"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 )
@@ -80,19 +78,11 @@ func pullCmd(c *cli.Context) error {
 	image := args[0]
 
 	var registryCreds *types.DockerAuthConfig
-	if c.String("creds") != "" {
-		creds, err := common.ParseRegistryCreds(c.String("creds"))
+
+	if c.IsSet("creds") {
+		creds, err := util.ParseRegistryCreds(c.String("creds"))
 		if err != nil {
-			if err == common.ErrNoPassword {
-				fmt.Print("Password: ")
-				password, err := terminal.ReadPassword(0)
-				if err != nil {
-					return errors.Wrapf(err, "could not read password from terminal")
-				}
-				creds.Password = string(password)
-			} else {
-				return err
-			}
+			return err
 		}
 		registryCreds = creds
 	}

cmd/podman/push.go

@@ -13,8 +13,8 @@ import (
 	"github.com/pkg/errors"
 	"github.com/projectatomic/libpod/libpod"
 	"github.com/projectatomic/libpod/libpod/common"
+	"github.com/projectatomic/libpod/pkg/util"
 	"github.com/urfave/cli"
-	"golang.org/x/crypto/ssh/terminal"
 )
 
 var (
@@ -97,25 +97,15 @@ func pushCmd(c *cli.Context) error {
 		}
 	}
 
-	registryCredsString := c.String("creds")
 	certPath := c.String("cert-dir")
 	skipVerify := !c.BoolT("tls-verify")
 	removeSignatures := c.Bool("remove-signatures")
 	signBy := c.String("sign-by")
 
-	if registryCredsString != "" {
-		creds, err := common.ParseRegistryCreds(registryCredsString)
+	if c.IsSet("creds") {
+		creds, err := util.ParseRegistryCreds(c.String("creds"))
 		if err != nil {
-			if err == common.ErrNoPassword {
-				fmt.Print("Password: ")
-				password, err := terminal.ReadPassword(0)
-				if err != nil {
-					return errors.Wrapf(err, "could not read password from terminal")
-				}
-				creds.Password = string(password)
-			} else {
-				return err
-			}
+			return err
 		}
 		registryCreds = creds
 	}

docs/podman-pull.1.md

@@ -65,7 +65,9 @@ Pathname of a directory containing TLS certificates and keys
 
 **--creds**
 
-Credentials (USERNAME:PASSWORD) to use for authenticating to a registry
+The [username[:password]] to use to authenticate with the registry if required.
+If one or both values are not supplied, a command line prompt will appear and the
+value can be entered.  The password is entered without echo.
 
 **--quiet, -q**
 

docs/podman-push.1.md

@@ -53,7 +53,9 @@ If the authorization state is not found there, $HOME/.docker/config.json is chec
 
 **--creds="CREDENTIALS"**
 
-Credentials (USERNAME:PASSWORD) to use for authenticating to a registry
+The [username[:password]] to use to authenticate with the registry if required.
+If one or both values are not supplied, a command line prompt will appear and the
+value can be entered.  The password is entered without echo.
 
 **cert-dir="PATHNAME"**
 

libpod/common/common.go

@@ -2,17 +2,9 @@ package common
 
 import (
 	"io"
-	"strings"
-	"syscall"
 
 	cp "github.com/containers/image/copy"
 	"github.com/containers/image/types"
-	"github.com/pkg/errors"
-)
-
-var (
-	// ErrNoPassword is returned if the user did not supply a password
-	ErrNoPassword = errors.Wrapf(syscall.EINVAL, "password was not supplied")
 )
 
 // GetCopyOptions constructs a new containers/image/copy.Options{} struct from the given parameters
@@ -60,23 +52,3 @@ func IsFalse(str string) bool {
 func IsValidBool(str string) bool {
 	return IsTrue(str) || IsFalse(str)
 }
-
-// ParseRegistryCreds takes a credentials string in the form USERNAME:PASSWORD
-// and returns a DockerAuthConfig
-func ParseRegistryCreds(creds string) (*types.DockerAuthConfig, error) {
-	if creds == "" {
-		return nil, errors.New("no credentials supplied")
-	}
-	if !strings.Contains(creds, ":") {
-		return &types.DockerAuthConfig{
-			Username: creds,
-			Password: "",
-		}, ErrNoPassword
-	}
-	v := strings.SplitN(creds, ":", 2)
-	cfg := &types.DockerAuthConfig{
-		Username: v[0],
-		Password: v[1],
-	}
-	return cfg, nil
-}

pkg/util/utils.go

@@ -0,0 +1,46 @@
+package util
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/containers/image/types"
+	"github.com/pkg/errors"
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+// Helper function to determine the username/password passed
+// in the creds string.  It could be either or both.
+func parseCreds(creds string) (string, string) {
+	if creds == "" {
+		return "", ""
+	}
+	up := strings.SplitN(creds, ":", 2)
+	if len(up) == 1 {
+		return up[0], ""
+	}
+	return up[0], up[1]
+}
+
+// ParseRegistryCreds takes a credentials string in the form USERNAME:PASSWORD
+// and returns a DockerAuthConfig
+func ParseRegistryCreds(creds string) (*types.DockerAuthConfig, error) {
+	username, password := parseCreds(creds)
+	if username == "" {
+		fmt.Print("Username: ")
+		fmt.Scanln(&username)
+	}
+	if password == "" {
+		fmt.Print("Password: ")
+		termPassword, err := terminal.ReadPassword(0)
+		if err != nil {
+			return nil, errors.Wrapf(err, "could not read password from terminal")
+		}
+		password = string(termPassword)
+	}
+
+	return &types.DockerAuthConfig{
+		Username: username,
+		Password: password,
+	}, nil
+}